摘要
疲劳开裂是沥青路面主要损坏形式之一。沥青在沥青混合料疲劳性能中起到重要作用。自SUPPERPAVE沥青技术规范中引入了沥青疲劳性能技术指标以来,国内外围绕沥青疲劳分析方法、评价指标开展了大量研究。基于动态剪切试验(DSR)和重复剪切试验(Time Sweep),形成了G*sinδ、N_(f50)、N_1、N_(p20)、N_(fm)等多种沥青疲劳性能评价指标。阐述了沥青疲劳性能分析方法、不同评价指标的意义和存在的问题,浅析了沥青疲劳性能研究的发展方向。
Fatigue cracking is one of the major distresses in asphalt pavement. Asphalt plays an importantrole in the fatigue property of asphalt mixture. Since SUPPERPAVE Specification introduced the index for as- phalt fatigue properties, a large number of studies on asphalt fatigue had been done around the world. Based on DSR test and DSR Time Sweep test, a variety of evaluation indexes for asphalt fatigue property had been de- veloped, such as G*sinδ、Nf50、N1、Np20、Nf10 This paper summarized the analysis methods and evaluation indexes for asphalt fatigue, also discussed some existing problems and the future researches.
出处
《石油沥青》
2013年第5期56-62,共7页
Petroleum Asphalt
关键词
沥青
疲劳
分析方法
评价指标
asphalt
fatigue
analysis method
evaluation index